---
title: Unsupported Encoding
slug: troubleshooting/unsupported-encoding
createdAt: 2025-05-29T16:47:58.703Z
---

### ERROR

Broadcaster Output Error - Unsupported Encoding

![Unsupported Encoding Error](https://api.archbee.com/api/optimize/mzxtTQEvCNIdUNgF2kuwJ/MmgoWSpcVVyfpp3-2HP8s_unsupported-encoding.png)

### ISSUE

The "Unsupported encoding" error usually relates to a codec the target cannot accept, the error comes from the target itself. It is most often an unsupported audio type. 

For example, RTMP output supports only AAC or MP3 audio, and only H.264 or HEVC video, any other audio (e.g. MPEG-1 Layer 1/2, AC-3) or video codec will be rejected with this error.

### RESOLUTION

- **Transcode** the stream and set the audio to **AAC** (MP3 is also accepted for RTMP), and video to H.264/HEVC; or
- Go back to the provider and have the encoding adjusted to a supported type — e.g. change the RTMP audio from MPEG to AAC.